commit a1cf11937665392bcfa223a5095ff903eb44c69b
Author: Jaroslav #karvada <jskarvad@redhat.com>
Date:   Fri Feb 12 18:29:13 2016 +0100

Backport patch from
http://gnuradio.org/redmine/projects/gnuradio/repository/revisions/a1cf11937665392bcfa223a5095ff903eb44c69b

Fix compilation in gcc-6
	    
Signed-off-by: Jaroslav #karvada <jskarvad@redhat.com>
Signed-off-by: Gwenhael Goavec-Merou <gwenhael.goavec-merou@trabucayre.com>
---
diff --git a/gr-fec/include/gnuradio/fec/polar_decoder_common.h b/gr-fec/include/gnuradio/fec/polar_decoder_common.h
index b0ecb85..a39ee4f 100644
--- a/gr-fec/include/gnuradio/fec/polar_decoder_common.h
+++ b/gr-fec/include/gnuradio/fec/polar_decoder_common.h
@@ -28,6 +28,10 @@
 #include <gnuradio/fec/generic_decoder.h>
 #include <gnuradio/fec/polar_common.h>
 
+#ifndef BOOST_CONSTEXPR_OR_CONST
+#define BOOST_CONSTEXPR_OR_CONST const
+#endif
+
 namespace gr {
   namespace fec {
     namespace code {
@@ -64,7 +68,7 @@ namespace gr {
         bool set_frame_size(unsigned int frame_size){return false;};
 
       private:
-        static const float D_LLR_FACTOR = -2.19722458f;
+        static BOOST_CONSTEXPR_OR_CONST float D_LLR_FACTOR = -2.19722458f;
         unsigned int d_frozen_bit_counter;
 
       protected:
